On 27-05-20, 09:23, Viresh Kumar wrote: > On 26-05-20, 23:18, Sibi Sankar wrote: > > https://patchwork.kernel.org/cover/11548479/ > > GPU driver uses Georgi's series > > for scaling and will need a way to > > remove the icc votes in the suspend > > path, (this looks like a pattern > > that might be used by other clients > > as well) I could probably update > > opp_set_bw to support removing bw > > when NULL opp is specified. Similarly > > opp_set_rate will need to support > > set bw to 0 when set_rate is passed > > 0 as target freq for the same use case. > > Sure, please send a patch for that. On a second thought, here is the patch. Please test it. -------------------------8<------------------------- Subject: [PATCH] opp: Remove bandwidth votes when target_freq is zero We already drop several votes when target_freq is set to zero, drop bandwidth votes as well. Reported-by: Sibi Sankar <sibis@xxxxxxxxxxxxxx> Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx> --- drivers/opp/core.c | 47 +++++++++++++++++++++++++++++++++++----------- 1 file changed, 36 insertions(+), 11 deletions(-) diff --git a/drivers/opp/core.c b/drivers/opp/core.c index 56d3022c1ca2..0c259d5ed232 100644 --- a/drivers/opp/core.c +++ b/drivers/opp/core.c @@ -725,6 +725,34 @@ static int _generic_set_opp_regulator(struct opp_table *opp_table, return ret; } +static int _set_opp_bw(const struct opp_table *opp_table, + struct dev_pm_opp *opp, bool remove) +{ + u32 avg, peak; + int i, ret; + + if (!opp_table->paths) + return 0; + + for (i = 0; i < opp_table->path_count; i++) { + if (remove) { + avg = 0; + peak = 0; + } else { + avg = opp->bandwidth[i].avg; + peak = opp->bandwidth[i].peak; + } + ret = icc_set_bw(opp_table->paths[i], avg, peak); + if (ret) { + dev_err(dev, "Failed to %s bandwidth[%d]: %d\n", + remove ? "remove" : "set", i, ret); + retrun ret; + } + } + + return 0; +} + static int _set_opp_custom(const struct opp_table *opp_table, struct device *dev, unsigned long old_freq, unsigned long freq, @@ -837,12 +865,17 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq) if (!_get_opp_count(opp_table)) return 0; - if (!opp_table->required_opp_tables && !opp_table->regulators) { + if (!opp_table->required_opp_tables && !opp_table->regulators && + !opp_table->paths) { dev_err(dev, "target frequency can't be 0\n"); ret = -EINVAL; goto put_opp_table; } + ret = _set_opp_bw(opp_table, opp, true); + if (ret) + return ret; + if (opp_table->regulator_enabled) { regulator_disable(opp_table->regulators[0]); opp_table->regulator_enabled = false; @@ -932,16 +965,8 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq) dev_err(dev, "Failed to set required opps: %d\n", ret); } - if (!ret && opp_table->paths) { - for (i = 0; i < opp_table->path_count; i++) { - ret = icc_set_bw(opp_table->paths[i], - opp->bandwidth[i].avg, - opp->bandwidth[i].peak); - if (ret) - dev_err(dev, "Failed to set bandwidth[%d]: %d\n", - i, ret); - } - } + if (!ret) + ret = _set_opp_bw(opp_table, opp, false); put_opp: dev_pm_opp_put(opp);
